The Honda NX250 was a new concept produced by Honda, a crossover dual-sport motorcycle available in the USA from 1988 thru 1990. It was a lightweight bike intended for both on-road and off-road riding. The NX250 featured the new MD21E engine which was a liquid-cooled, 249 cc, single-cylinder, four-valve, DOHC, four-stroke with an electric start. It had a bore and stroke of 70.0 × 64.8 mm (2.76 × 2.55 in), 11 to 1 compression ratio, and a six-speed transmission. 88 89 90 1888 1989 1990